Clinical presentation

Clinical symptoms may include progressive nasal obstruction, rhinorrhea, facial pain, headache, anosmia, etc 3. It can also cause a particular pattern of chronic sinusitis as a result of obstruction of the drainage pathways of the paranasal sinuses.

Pathology

Polyps are formed by the influx of fluid into the lamina propria of the sinonasal Schneiderian mucosa 8,9.

Radiographic features

CT

extensive mucosal polyps occupying and obliterating the nasal cavity and the paranasal sinuses

usually, they are hypodense, but may be hyperdense due increased protein content or fungal infection

associated local benign bone remodelling or erosion (as opposed to a mucocoele where the entire sinus is expanded 6)